Environmental Engineering Reference
In-Depth Information
where, W - the volume of pore water, released as a result of compaction OGMT
and/or passed through it over time t ; x - the mass of the produced hydrocarbon
substances.
Substituting Eqs. (5.21) and (5.23) (5.24), we have
(5.25)
which after integration and simple transformations gives
(5.26)
According to the Eq. (5.23) obtained formula remains valid until C < C 0 . When C
= C 0 then the hydrocarbon generation ceases. If the current hydrocarbon concen-
tration exceeds a specified limit (i.e., hydrocarbon products of degradation are
beginning to stand out in a separate phase, forming gas bubbles or droplets of oil)
then the formula loses physical meaning.
Equation (5.26) is valid during the primary migration of hydrocarbons and
loses its physical meaning in the transition to the process of secondary migration.
From this it follows that the inequality G > 0 is always performed, G = 0at t = 0
and when
t
, G tends to
, which is quite realistic.
=+
where, - volume of failuation, which flow through unit area of OGMT by
thickness h , and w 0 -volume of pore fluid contained in a block of OGMT with a
single base and height h , value is always less than 1. However, w 0 is the
volume in which occurs in the reaction of degradation of DOM. It is equal to the
volume of voids of OGMT, including the volume occupied by the DOM. This can
be written as
Since
WwW φ
0
=+ G , which in turn suggests that the inequality
W
hn
h
/
0
h
Γ
h
Γ
=
<
1
2
C W
2(
C
hn
+ Γ r+
h
/
W φ
)
0
0
It should be noted that the density of DOM does not exceed the
3
, andis
2
/
t
/
m
2 C at a
oftensignificantlyless; hn > G in most cases is of practical interest, and
0
depth of petroleum is always more than 1 kg/m 3 .
As formulated in the task, the movement of pore fluid in the clay thickness
in the inviolate natural environment under the principles of geofluid dynamics of
slow flow is realized in the fiylation regime. It is absolutely clear that the alien
pore water molecules of hydrocarbon-derivatives will be forced to fall on the axis
of the pore channels with greater frequency than the water molecules. This is due
to the fact that near the walls of the pore channels molecules of water are
Search WWH ::




Custom Search